十进制转16进制内的js方法

let num = 127
        const trans = (num,x)=>{
            let r = []
            let t = {
                10:'A',
                11:'B',
                12:'C',
                13:'D',
                14:'E',
                15:'F'
            }
            while(num>=x){
                r.push(num%x)
                num = num/x|0
            }
            r.push(num%x)
            let str = ''
            for(let i=0;i<r.length;i++){
                if(+r[i]>9){
                    str = t[r[i]] + str
                }else{
                    str = r[i] + str
                }
            }
            return str
        }
        let res = trans(num,9)
        console.log(res)